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. Economic entomology. Beneficial insects; Insect pests; Thysanura. 96 ARACHNOIDEA. CASE The types of this group are the red spider of our hot-houses, and the harvest mites of our fields. These form two distinct sections; the former consisting only of vegetable feeders, while there is little doubt that the latter are predacious and carnivorous. One would naturally expect from this that they should be easily distinguished from each other, and so for the most part they are, so far as general facies goes, the former being very minute semi- transparent, and not what is called very loud in their co

. Economic entomology. Beneficial insects; Insect pests; Thysanura. 96 ARACHNOIDEA. CASE The types of this group are the red spider of our hot-houses, and the harvest mites of our fields. These form two distinct sections; the former consisting only of vegetable feeders, while there is little doubt that the latter are predacious and carnivorous. One would naturally expect from this that they should be easily distinguished from each other, and so for the most part they are, so far as general facies goes, the former being very minute semi- transparent, and not what is called very loud in their co Stock Photo
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The Book Worm / Alamy Stock Photo

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RDYMPX

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7.2 MB (172 KB Compressed download)

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2044 x 1223 px | 34.6 x 20.7 cm | 13.6 x 8.2 inches | 150dpi

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. Economic entomology. Beneficial insects; Insect pests; Thysanura. 96 ARACHNOIDEA. CASE The types of this group are the red spider of our hot-houses, and the harvest mites of our fields. These form two distinct sections; the former consisting only of vegetable feeders, while there is little doubt that the latter are predacious and carnivorous. One would naturally expect from this that they should be easily distinguished from each other, and so for the most part they are, so far as general facies goes, the former being very minute semi- transparent, and not what is called very loud in their colours : white, pale yellow, pale orange, pale flesh colour, pale rust- coloured, or pale red; while the harvest mites are larger, velvety, and opaque, rarely semi-transparent, and of the most brilliant and decided colours, generally some shade of scarlet, vermilion, or red lead, varied sometimes with black. Some species have seven joints in the leg, others only six; and Koch has used that as a distinctive character for separating a portion of the family from the rest. All have two claws to their tarsi; but the Tetranychi have them short, rigid, close together, . Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original work.. Murray, Andrew, 1812-1878. [London] Chapman and Hall

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